AI is you!

In Synthetic Dawn you can play as AI or robotic faction, which has no need for hapiness and have habitability for each planet. Maybe more of an immersion pack with interesting way to play, but not everybody will like it.

Are you humanoid enough?

Stellaris: Humanoids Species Pack is more an immersion pack with new portraits, new ships, new voices and new music then game changing stuff, but if you want to enjoy Stellaris at 100% then it's a good DLC.

Jules Verne maybe would like it

Diluvion is a 3D submarine action game with RPG and micromanagement elements. The story is nice, the controls are not so good but you can manage it. Fight, loot and enjoy! The devs even made the possiblity to buy pre-order items now.